Improvement in devices for fastening the slats of venetian shutters



UNITED STAT-Es PATENT OFETGE.

GEO. L. OHAPIN, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN DEVICES FOR FASTENING THE SLATSAOF VENETIAN SHUTTERS.

Specification forming part of Letters Patent No. 57,675, dated September4, 1866.

cludiug the blind to which it is attached. Fig.

2 is a horizontal section of the fastener and blind, taken through theplace indicated by the red line x rr, Fig. 1. Fig. 3 is a centralsectional elevation of my fastener and a part ofthe blind.

The object of my invention is to provide convenient means by which theslats or lioats of common Venetian blinds may-be fastened on the insidein such a manner as to prevent the possibility of the slats bein gturned from the outside without breaking or cutting away some portionofthe blind.

The object to be gained by the use of my invention is, rst, thepreventing of evil-disposed persons from turning the slats on theoutside of the blind and making au examination of the premises; second,an additional bar against burglars, from the fact that when the slatsare securely fastened it is impossible to introduce any device throughthe blind for raising the catch which secures the blind to thewindow-sill, third, the slats may be shut closely together in case of astorm, and when the blind is swung against the side of the building, aswhen opened,'th e edges of the slats are not liable to be broken.

To enable others skilled in the art to make and use my invention, I willdescribe the method of construction and operation.

D represents the lower rail, E the stiles, Z the slats, and B the'rod,of the common Venetian blind to which my fastener is attached. Frepresents the metallic plate, in which is made the slot i, in orderthat the thumb-screw O a may be slid up and down when fastening andunfastening the slats. In the back side of this plate is made a verticalgroove of the proper size for the bolt J to slide in. The object of thebolt J is to operate against the lower end of the rod B and prevent itfrom being The thumbscrew O a passes into the bolt J,.

and should be battered or riveted on the back side of the bolt, so as toprevent the screw from heilig turned out too far.

K shows the thin metallic band, which isdriven onto the end of the rodB, in order to make a firm support for the upper end of the boltJ topress against, and to secure this end a notch is made in the lower endof the band K, so as to prevent the possibility of the end of the rodbeing forced from the end of the bolt J.

Operation: In order to use my invention I hereby give the followingdirections: The plate F maybe either let into the rail D, so that theface of the rail shall correspond with the face of the plate, or theplate may be secured to the surface of the rail; but in either case thescrews amust be put through the plate F into the rail D in the usualmanner.

In order to fasten the blind-slats, they must be first shut inthe usualmanner. The thumbscrew O a must then be forced upward, which will placethe end of the bolt J into the notch made in the band K. The screw O amust then be tightened in the usual manner, and the slats will befastened.

When it is required to unf-asten the slats the screw O a must beloosened, which will allow the bolt J to pass down out of the way,sothat the slats can be operated in the usual manner. Y v

Haviu g thus 'fully described my device, what I claim `as my invention,and desire to secure by Letters Patent of the United States, 1s-

rlhe arrangement and combination of the plate F, bolt J, screw O a, andthe notched band K, substantially as set forth and described.

GEO. L. OHAPIN.

Witnesses:

ALBERT HAYWARD, A. H. GHAPIN.

